1. Division of Epidemiology and Pharmacoepidemiology of Rheumatic Diseases; Institute of Rheumatology; Tokyo Women's Medical University; Tokyo Japan
2. Department of Pharmacovigilance; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
3. Department of Rheumatology; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University; Tokyo Japan
4. Tokyo Medical and Dental University; Tokyo Japan